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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old July 21st, 2021, 10:01 PM
arepoff arepoff is offline
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Default Original specs for 478 needed

Hi,

Currently in process of assembling my 478, was machined prior, I couldn't find original specs/measurements to base this build on. Does anyone have access or know where to find these?

Thank you

Alexi
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  #2  
Old July 24th, 2021, 01:14 AM
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LEWISMATKIN LEWISMATKIN is offline
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Default Re: Original specs for 478 needed

Quote:
Originally Posted by arepoff View Post
Hi,

Currently in process of assembling my 478, was machined prior, I couldn't find original specs/measurements to base this build on. Does anyone have access or know where to find these?

Thank you

Alexi
what specs exactly are you asking for??????
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  #3  
Old July 24th, 2021, 07:08 AM
arepoff arepoff is offline
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Default Re: Original specs for 478 needed

crank and rod clearances, I need to order bearings. Or original crank and rod diameters to base my machined parts
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  #4  
Old July 25th, 2021, 09:54 PM
Prowbar Prowbar is offline
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Default Re: Original specs for 478 needed

Took some pictures of my manual, has all the V6 specs you need including torque values. Good luck.
When you enlarge them they have the proper orientation.
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File Type: jpg 20210725_214758.jpg (3.63 MB, Multiple views, 9 clicks)
File Type: jpg 20210725_214836.jpg (3.81 MB, Multiple views, 4 clicks)
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Old July 25th, 2021, 09:56 PM
Prowbar Prowbar is offline
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Default Re: Original specs for 478 needed

More pics.
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File Type: jpg 20210725_214856.jpg (3.30 MB, Multiple views, 3 clicks)
File Type: jpg 20210725_214940.jpg (3.60 MB, Multiple views, 5 clicks)
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  #6  
Old July 25th, 2021, 11:00 PM
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Default Re: Original specs for 478 needed

thanks, Prowbar, for furnishing the info for arepoff.
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  #7  
Old July 26th, 2021, 04:32 AM
arepoff arepoff is offline
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Default Re: Original specs for 478 needed

Prowbar, I really appreciate your help! This info is what I needed.
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